Characterization and reduction of noise in Mo/Au transition edge sensors

Mark A. Lindeman*, Simon Bandler, Regis P. Brekosky, James A. Chervenak, Enectali Figueroa-Feliciano, Fred M. Finkbeiner, Tarek Saab, Caroline K. Stahle

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We measured noise in a variety of Mo/Au transition-edge sensor (TES) X-ray calorimeters. We investigated the relationship between the noise, bias, and the superconducting phase transition in the TESs. Our square TES calorimeters have achieved very good energy resolutions (2.4 eV at 1.5 keV) but their resolutions have been limited by broadband white excess noise generated by the TES when it is biased in the phase transition. We have recently fabricated Mo/Cu TESs with interdigitated normal metal bars deposited on top of the bilayer. The new TES calorimeters have demonstrated little or no excess noise in the phase transition. These results point the way to development of TES calorimeters with higher energy resolution.

Original languageEnglish (US)
Pages (from-to)348-350
Number of pages3
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume520
Issue number1-3
DOIs
StatePublished - Mar 11 2004

Keywords

  • Bilayer
  • Calorimeter
  • Gold
  • Molydenum
  • Reduced excess noise
  • Transition edge sensor

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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